DJVU PDF Benedict, P.K. 1994, "The perils of reconstruction: the case of Proto-Yao", in Linguistics of the Tibeto-Burman Area, vol. 17, no. 2, pp. 153-154. cite.

DJVU PDF Solnit, D.B. 1996, "Some evidence from Biao Min on the initials of Proto-Mienic (Yao) and Proto-Hmong-Mien (Miao-Yao)", in Linguistics of the Tibeto-Burman Area, vol. 19, no. 1, pp. 1-18. cite.